Chan’s restaurant on Baker Street, used to be poorly run, is now a successful business.
A. that
B. which
C. who
D. where
网友回答
A. that
(答案→)B. which
C. who
D. where
解析：which引导定语从句，指代上文中的Chan’s restaurant。根据逗号可判断出这是一个非限制性定语从句，在非限制性定语从句中只能用which引导而不能用that引导。who引导定语从句时，指人。where引导定语从句时，在从句中作地点状语。